Thought of a scene that could be in 2 parts
Part 1
You are asleep in bed when you sister comes in - she's been on a night out and is drunk - she's wearing a tight revealing dress and high heels. "Oops, wrong room. Sorry, didn't wake you up did I?" she says and starts to giggle. "My brother won't mind though if I sleep on his bed for a bit will you?" She takes off her heels and lies down on the bed next to you. "I has such a good night with the girls, all the men in the bars were tossers though. Move up closer to me, I could do with a cuddle."
She closes her eyes for a bit, but then suddenly opens them "What's that against my leg? Have you got a hard on?... I should've known your sister in a hot dress lying in bed next to you would turn you on. Wow, it looks so huge through your shorts. Go on lets have a look at it then." She giggles. You take your cock out and she smiles. "I didn't know my brother's cock was so big. I've seen the way you look at me, trying to peek at me when I'm in the shower and when I'm getting changed. I didn't know I turn you on so much. Go on then, wank over me, I know your dying too."
"I know what will get you even bigger and harder." she takes off her dress and bra. "Your wanking so hard and fast, it's really turning me on... I could do with getting fucked tonight, I need to sit on a big hard cock. I want my brother's cock inside me." She takes off her panties and you begin fucking her. (This could be a pov shot where you see her face and tits, or from behind) She's enjoying it, moaning in pleasure, saying things like "My brother's cock fills me up so good, it's a pefect fit up my pussy." "I hope mum and dad can't hear me, if they found us like this they'd kill us." and "Oh my god, i'm cumming so much, I've never come like this before, yours is the best cock I've ever fucked."
"I want to see my brother's spunk, cum all over my tits." You stop fucking her and she pushed up her tits for you to cum on. "Go on, drain your balls all over your sister's tits." You cum all over them. "Mmmm, you've cum so much, it's everywhere. That was amazing, lets go to sleep now." The scene ends.
Part 2
It's the morning after, your sister comes into your room wearing a bathrobe - she's just had a shower. "Hi, just wanted to say about last night... er, you know, about what we did... I can't remember much, but I remember a bit and well, you know what we did and we have to keep it a secret, no-one can know that we slept together, we're brother and sister." She notices you've got a hard on because her tits are poking out of the robe. "Fucking hell, don't get any ideas, we can't ever do anything like that again and mum and dad are downstairs. Listen, I meant to ask you, where did you cum? Did you cum over me? Inside me? Oh, over my tits, ok. No, I don't remember you cumming on my tits. I was drunk wasn't I, I hardly remember anything."
She begins to smile "I do remember how good your cock felt inside me though. I remember all the orgasms I had, my pussy's still throbbing. Wish I could remember you cumming on my tits, would've liked to have seen that." You start trying to convince her to let you cum on them again. "We can't... Well we can't shag again right now, mum and dad will hear us. Oh go in then, get your cock out, let me see it." She watches you start to wank.
She then drops her robe so she's naked and goes over to you and kneels down in front of your cock. "I don't think I give you a blowjob last night did I?" She starts giving you a blowjob. "It so big, it tastes so good. I don't think I can ever have any other cock after having my brother's." After a few minutes of this she asks "Are you ready to cum? Let me wank you off over my tits." She takes you cock in her hand and starts wanking you. "Go on, shoot your load over your sister's tits, I wanna see my brother's spunk." You shoot a load of cum over her chest. "Oh wow, that's a lot. Maybe everytime I go on a night out with the girls we can do this... Wait, sshhh, someone's walking towards the room, quick, hide!" She jumps up, the screen fades and the scene ends.
Part 1
You are asleep in bed when you sister comes in - she's been on a night out and is drunk - she's wearing a tight revealing dress and high heels. "Oops, wrong room. Sorry, didn't wake you up did I?" she says and starts to giggle. "My brother won't mind though if I sleep on his bed for a bit will you?" She takes off her heels and lies down on the bed next to you. "I has such a good night with the girls, all the men in the bars were tossers though. Move up closer to me, I could do with a cuddle."
She closes her eyes for a bit, but then suddenly opens them "What's that against my leg? Have you got a hard on?... I should've known your sister in a hot dress lying in bed next to you would turn you on. Wow, it looks so huge through your shorts. Go on lets have a look at it then." She giggles. You take your cock out and she smiles. "I didn't know my brother's cock was so big. I've seen the way you look at me, trying to peek at me when I'm in the shower and when I'm getting changed. I didn't know I turn you on so much. Go on then, wank over me, I know your dying too."
"I know what will get you even bigger and harder." she takes off her dress and bra. "Your wanking so hard and fast, it's really turning me on... I could do with getting fucked tonight, I need to sit on a big hard cock. I want my brother's cock inside me." She takes off her panties and you begin fucking her. (This could be a pov shot where you see her face and tits, or from behind) She's enjoying it, moaning in pleasure, saying things like "My brother's cock fills me up so good, it's a pefect fit up my pussy." "I hope mum and dad can't hear me, if they found us like this they'd kill us." and "Oh my god, i'm cumming so much, I've never come like this before, yours is the best cock I've ever fucked."
"I want to see my brother's spunk, cum all over my tits." You stop fucking her and she pushed up her tits for you to cum on. "Go on, drain your balls all over your sister's tits." You cum all over them. "Mmmm, you've cum so much, it's everywhere. That was amazing, lets go to sleep now." The scene ends.
Part 2
It's the morning after, your sister comes into your room wearing a bathrobe - she's just had a shower. "Hi, just wanted to say about last night... er, you know, about what we did... I can't remember much, but I remember a bit and well, you know what we did and we have to keep it a secret, no-one can know that we slept together, we're brother and sister." She notices you've got a hard on because her tits are poking out of the robe. "Fucking hell, don't get any ideas, we can't ever do anything like that again and mum and dad are downstairs. Listen, I meant to ask you, where did you cum? Did you cum over me? Inside me? Oh, over my tits, ok. No, I don't remember you cumming on my tits. I was drunk wasn't I, I hardly remember anything."
She begins to smile "I do remember how good your cock felt inside me though. I remember all the orgasms I had, my pussy's still throbbing. Wish I could remember you cumming on my tits, would've liked to have seen that." You start trying to convince her to let you cum on them again. "We can't... Well we can't shag again right now, mum and dad will hear us. Oh go in then, get your cock out, let me see it." She watches you start to wank.
She then drops her robe so she's naked and goes over to you and kneels down in front of your cock. "I don't think I give you a blowjob last night did I?" She starts giving you a blowjob. "It so big, it tastes so good. I don't think I can ever have any other cock after having my brother's." After a few minutes of this she asks "Are you ready to cum? Let me wank you off over my tits." She takes you cock in her hand and starts wanking you. "Go on, shoot your load over your sister's tits, I wanna see my brother's spunk." You shoot a load of cum over her chest. "Oh wow, that's a lot. Maybe everytime I go on a night out with the girls we can do this... Wait, sshhh, someone's walking towards the room, quick, hide!" She jumps up, the screen fades and the scene ends.